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Capacitor discharge welding: analysis through ultrahigh speed photography.
Wilson-RD; Woodyard-JR Sr.; Devletian-JH
Welding J 1993 Mar; 71(Suppl):101s-106s
Ultrahigh-speed photography of 44,000 frames/s was used to investigate the capacitor discharge welding (CDW) process. The objective of the study was to use high-speed photography and a finite element computer program to help describe the heat flow characteristics of the CDW cycle. The photos revealed that the plasma jet from the cathode was responsible for expelling metal from the anode rather than being squeezed out on contact. Photographic evidence suggested that the unequal anode/cathode heating ratio is primarily due to heat transfer from the anode to the expelled metal particles.
Welding; Analytical processes; Author Keywords: Capacitor Discharge; CWD; Photographic Analysis; Ultrahigh Speed; RSP Alloys; Transient Phenomena; Expulsion; Plasma Jet; Anode/Cathode Heat; Metal Spatter
Page last reviewed: April 12, 2019
Content source: National Institute for Occupational Safety and Health Education and Information Division